When using offiline folders, and once connected to the network, CPU utilization from under 10% to more than 40% with HD reaching 100 KB/sec bringing the computer to a crippiling halt. I have used process explorer to narrow down the possibilities. Insofar, offline folders (CSCService) seems to be the issue. Any advise is much appreciated.

Hi, Thanks for your post. First of all, please understand that to solidly troubleshoot high CPU usage/application hang issues, we may need to debug the related process and then identify the root cause. Unfortunately, debugging is beyond what we can do in the forum. Therefore, I would like to suggest that we perform basic troubleshooting here. If the issue cannot be resolved after that, I may still need to suggest that you contact Microsoft Customer Service and Support (CSS) for further investigation in the future. Thanks for your understanding. To move on, could you please help provide the following information? 1. Did CPU utilization always stay at the range of 40% or it decreased after a few minutes? If it decreased after a while, it should be normal behavior and can be ignored. By default, while you connect the computer to the network, offline files will automatically be synchronized with network folders. If there are some difference between offline files and network files, Windows will start a copying process between your computer and the network folder, this process will increase CPU utilization. Otherwise, if CPU utilization always stays at 40%, we should check what the exact cause is. 2. As you mentioned above, I understand that you have performed many research on this issue. To ensure we troubleshoot this issue efficiently, could you please let me know how you identified the root cause is related to cscservice? Generally, to find out which process takes abnormal CPU source, we can open the task manager to see which process uses the abnormal CPU source. You can perform this method to clarify whether your conclusion is right. In task manager, if it is the process of an application that use abnormal CPU source, please note the name of this application and temporally uninstall it to see if the issue persists. Otherwise, if the process is SVCHOST.EXE, it may be related to a service. In this case, you can use the following steps to find out what applications are using most of the CPU: a) Right click the taskbar, and click Task Manager to open. b) In Task Manager, click on the Processes tab, and look for the process that is using abnormal CPU and note its PID (Process ID). Note: You may need to go to the "View" -> "Select Columns" menu and check PID (Process Identifier) first. c) Once you have the PID, please run the following command line from a command prompt: tasklist/svc. d) Please check the output item of the related SVCHOST.EXE process (with the recorded PID), and see if it is related to CscService. You can uninstall these services to see if the issue persists. 3. Have you performed a clean boot to see if the issue occurs. This method will help you to determine if this issue is caused by a loading program or service. a) Click the Start Button type "msconfig" (without quotation marks) in the Start Search box, and then press Enter. Note: If prompted, please click Continue on the User Account Control (UAC) window. b) Click the "Services" tab, check the "Hide All Microsoft Services" box and click "Disable All" (if it is not gray). c) Click the "Startup" tab, click "Disable All" and click "OK". Then, restart the computer. When the "System Configuration Utility" window appears, please check the "Don't show this message or launch the System Configuration Utility when Windows starts" box and click OK.Hope this helps. Thanks.